470 



BOTANY AND PHARMACOGNOSY. 



Fig. 203. Ipecac. A, transverse section of Rio ipecac showing outer layers ot 

 cork (a) ; cork cells (b) ; phellogen (m) ; parenchyma containing starch (p) ; raphides (x) ; 

 cambium (c) ; tracheids (t). B, longitudinal section of a portion of the wood showing duct- 

 like tracheids (a) ; tracheids with bordered pores (b) , linear pores (c) and oblique linear 

 pores (d); transition tracheids (e); tracheids with delicate pores (f). C, starch grains of 

 Rio ipecac. D, slightly larger starch grains of Carthagena ipecac. After Schneider. 



